<html>
<body>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<div id="app-4">
    <ol>
      <li v-for="todo in todos">
        {{ todo.text }}
      </li>
    </ol>
</div>
<script>
  var app4 = new Vue({
    el: '#app-4',
    data: {
      todos: [
        { text: '学习 JavaScript' },
        { text: '学习 Vue' },
        { text: '整个牛项目' }
      ]
    }
  })
</script>
</body>
</html>